If you're a Gold subscriber with Xbox Live, then you can pick up Halo 3 and Might & Magic: Clash of Heroes free in October.
As part of Microsoft's new Games with Gold program, Gold members can get Might & Magic for free on October 1st, and then Halo 3 on October 16th. Both games are normally $14.99 in the Xbox Live Game Marketplace.
[Source]

Why on Earth would... ? Never mind. The latest rumor to surface today is that
Microsoft's newly formed internal Halo studio, 343 Industries, might've been
assigned to create a Halo: Combat Evolved remake.
The report originated from
"industry chatter" in the latest issue of Games Master magazine...

Did any of you think this game would sell badly? No? Neither did I. Bungie's
Halo 3: ODST sold 2.5 million copies in its first two weeks.
USA Today reports that overall sales reached $125 million in revenue so far. "That's pretty good for a game that most called an 'expansion pack,'" said Wedbush analyst Michael Pachter...

Bungie releases the latest
footage from Halo 3: ODST, the standalone expansion for Halo 3. As you should
know by now, the main character isn't Master Chief. Instead gamers are placed
in the role of an Orbital Drop Shock Troopers:
VIDEO: Halo3ODSTdd.flv

Yep, another Halo game is coming our way. If you've missed previous updates,
you should know that this is actually a standalone expansion for Halo 3. Check
out the 'Desperate
Measures ViDoc' trailer:
VIDEO: Halo3_ODST_DesperateMtr.flv
Halo 3: ODST is in the works for the Xbox 360 and is slated to arrive on September
22, 2009.

About Halo 3:
ODST. I've just seen over
at GameStop that the game carries a price of $59.99. So, what exactly does
this mean? Well, it can signify two things: either we're going to get as much
content as in the Halo 3 campaign or we're about to get our wallets butt-rapred
by MS.

Check out the latest screenshots from Bungie's Halo 3: ODST:
click to view full gallery
The single-player shooter Halo 3: ODST is set to arrive on September 22. The
release is going to include the new Firefight mode, every Halo 3 multiplayer
map released thus far and three new maps. Of course, Microsoft also promised
that the game will include multiplayer beta access for the next Halo game -
Halo: Reach.

Bungie made the confirmation that since Halo 3 launched for the Xbox 360 in September
2007, the incredibly popular shooter registered billion matches played online.
"One Billion. It's a giant number, one that's difficult to understand
without the proper context...

Microsoft's shooter Halo 3: Recon, the standalone
DVD release, officially received a new name. The game will be known from
now on as Halo
3: ODST (which as any self-respecting Halo fan should know stands for Orbital
Drop Shock Trooper)...

Coupled with the announcement of Halo 3: Recon and a spiffy
new cinematic trailer, Microsoft confirmed that this expansion pack is going
to be a standalone DVD release, which won't be requiring a copy of Halo 3 (360)
in order to be played...

VIDEO: Halo3Recon.flv
I'm suitably turned on, how about you guys?
What you just saw was the official
trailer for the new chapter in the Halo saga. It's actually prequel to Bungie's
Halo 3 and gives players a chance to experience some of the events that lead
up the story...

Bungie posted a Halo-related teaser (yet again) on the development studio's
official web site. The company is planning an announcement, obviously, and from
what it looks like, we are going to get more content for Halo 3. They've released
a teaser trailer, albeit it doesn't go much into detail; it just says: "High
action and deep mystery await players in this new Halo 3 campaign experience.
Prepare to drop!"
Check out the teaser
below:
VIDEO: KeepItClean.flv

Bungie, the makers of Halo 1, 2 and 3 are at present working on three
different projects. "At the moment we do have three distinct projects underway
within Bungie - some familiar, some not. Some on a closer horizon, some quite
far off," the company said...